Ballpoint pen



FIG. 1 is a perspective view of the ballpoint pen;

FIG. 2 is a front face elevation of the ballpoint pen;

FIG. 3 is a left side elevation of the ballpoint pen;

FIG. 4 is a right side elevation of the ballpoint pen;

FIG. 5 is an enlarged top view of the ballpoint pen; and,

FIG. 6 is an enlarged bottom view of the ballpoint pen.

The features in broken lines in FIG. 5 are included for the purpose of showing portions that form no part of the claimed design. 

CLAIM I claim the ornamental design for a ballpoint pen, as shown and described. 